NEW 1.25" Double Helical Focuser for ZWO QHY HERCULES Off-Axis Guider OAG Deep-Sky Imaging Black Main Feature: 1. High Precision double helical focuser for guider scope / finder scope Interface 2. The solution for telescopes or telephoto lenses with sluggish focusing 3. Item was made by Full metal, durable 4. Accuracy: 0.1mm 5. Interface: 1.25-inch w/ M42*0.75 male thread 6. Primary Mirror Interfaces: Female M42*0.75 7. Focusing stroke: 9mm 8. Minimum length: 45mm 9. Longest length: 54mm 10. Net Weight: 89g / 3.3oz 11. Suitable for ZWO OAG Guider Scope 12. Note: Only Support ZWO ASI120MM Mini Monochrome Astronomy Camera、Player One Ceres-M USB3.0 Mono Guiding Camera and so on (COMS can reach focus at same position with eyepiece ) Package Includes:  1.25inch High Precision Double Helical Focuser w/ M42*0.75  3PCS M3 Screws

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